package com.nowcoder.community.controller;

import com.alibaba.fastjson2.JSONObject;
import com.nowcoder.community.entity.Message;
import com.nowcoder.community.entity.Page;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.MessageService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.HostHolder;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.util.HtmlUtils;

import java.util.*;
import java.util.stream.Collectors;

/**
 * @author bombax
 * @date 2024-08-17 22:56
 */
@Controller
public class MessageController {
    @Resource
    private MessageService messageService;

    @Resource
    private HostHolder hostHolder;

    @Resource
    private UserService userService;

    // 私信列表
    @GetMapping("/letter/list")
    public String getLetterList(Model model, Page page) {
        User user = hostHolder.getUser();
        // 分页信息
        page.setLimit(5);
        page.setPath("/letter/list");
        page.setRows(messageService.findConversationCount(user.getId()));
        // 会话列表
        List<Message> conversationList = messageService.findConversations(user.getId(), page.getOffset(), page.getLimit());
        List<Map<String, Object>> conversations = new ArrayList<>();
        for (Message message : conversationList) {
            Map<String, Object> map = new HashMap<>();
            map.put("conversation", message);
            map.put("letterCount", messageService.findLetterCount(message.getConversationId()));
            map.put("unreadCount", messageService.findLetterUnreadCount(user.getId(), message.getConversationId()));
            int targetId = user.getId() == message.getFromId() ? message.getToId() : message.getFromId();
            map.put("target", userService.findUserById(targetId));
            conversations.add(map);
        }
        model.addAttribute("conversations", conversations);

        // 查询未读消息数量
        int letterUnreadCount = messageService.findLetterUnreadCount(user.getId(), null);
        model.addAttribute("letterUnreadCount", letterUnreadCount);
        // 未读通知数量
        int noticeUnreadCount = messageService.findNoticeUnreadCount(user.getId(), null);
        model.addAttribute("noticeUnreadCount", noticeUnreadCount);
        return "site/letter";
    }

    @GetMapping("/letter/detail/{conversationId}")
    public String getLetterDetail(@PathVariable("conversationId") String conversationId, Model model, Page page) {
        // 分页信息
        page.setLimit(5);
        page.setPath("/letter/detail/" + conversationId);
        page.setRows(messageService.findLetterCount(conversationId));

        // 私信列表
        List<Message> letterList = messageService.findLetters(conversationId, page.getOffset(), page.getLimit());
        List<Map<String, Object>> letters = new ArrayList<>();
        for (Message message : letterList) {
            Map<String, Object> map = new HashMap<>();
            map.put("letter", message);
            map.put("fromUser", userService.findUserById(message.getFromId()));
            letters.add(map);
        }
        model.addAttribute("letters", letters);

        // 私信目标
        model.addAttribute("target", getLetterTarget(conversationId));

        // 设置已读
        List<Integer> ids = getLetterIds(letterList);
        if (!ids.isEmpty()) {
            messageService.readMessage(ids);
        }
        return "site/letter-detail";
    }

    private List<Integer> getLetterIds(List<Message> letterList) {
        return letterList.stream()
                .filter(message -> message.getToId() == hostHolder.getUser().getId() && message.getStatus() == 0)
                .map(Message::getId).collect(Collectors.toList());
    }

    private User getLetterTarget(String conversationId) {
        String[] ids = conversationId.split("_");
        int id0 = Integer.parseInt(ids[0]);
        int id1 = Integer.parseInt(ids[1]);
        return hostHolder.getUser().getId() == id0 ? userService.findUserById(id1) : userService.findUserById(id0);
    }

    @PostMapping("/letter/send")
    @ResponseBody
    public String sendLetter(String toName,String content) {
        User target = userService.findUserByName(toName);
        if(target == null) {
            return CommunityUtil.getJSONString(1, "目标用户不存在");
        }

        Message message = new Message();
        message.setFromId(hostHolder.getUser().getId());
        message.setToId(target.getId());
        if(message.getFromId() < message.getToId()) {
            message.setConversationId(message.getFromId() + "_" + message.getToId());
        } else {
            message.setConversationId(message.getToId() + "_" + message.getFromId());
        }
        message.setContent(content);
        message.setCreateTime(new Date());
        messageService.addMessage(message);
        return CommunityUtil.getJSONString(0);
    }

    @GetMapping("/notice/list")
    public String getNoticeList(Model model) {
        User user = hostHolder.getUser();

        // 查询评论类通知
        Message message = messageService.findLatestNotice(user.getId(), CommunityConstant.TOPIC_COMMENT);
        Map<String, Object> messageVO = new HashMap<>();
        if(message != null) {
            messageVO.put("message", message);
            String content = HtmlUtils.htmlUnescape(message.getContent());
            Map<String,Object> data = JSONObject.parseObject(content, Map.class);
            messageVO.put("user", userService.findUserById((Integer) data.get("userId")));
            messageVO.put("entityType", data.get("entityType"));
            messageVO.put("entityId", data.get("entityId"));
            messageVO.put("postId", data.get("postId"));

            int count = messageService.findNoticeCount(user.getId(), CommunityConstant.TOPIC_COMMENT);
            messageVO.put("count", count);
            int unread = messageService.findNoticeUnreadCount(user.getId(), CommunityConstant.TOPIC_COMMENT);
            messageVO.put("unread", unread);
        }
        model.addAttribute("commentNotice", messageVO);

        // 查询点赞类通知
        message = messageService.findLatestNotice(user.getId(), CommunityConstant.TOPIC_LIKE);
        messageVO = new HashMap<>();
        if(message != null) {
            messageVO.put("message", message);
            String content = HtmlUtils.htmlUnescape(message.getContent());
            Map<String,Object> data = JSONObject.parseObject(content, Map.class);
            messageVO.put("user", userService.findUserById((Integer) data.get("userId")));
            messageVO.put("entityType", data.get("entityType"));
            messageVO.put("entityId", data.get("entityId"));
            messageVO.put("postId", data.get("postId"));

            int count = messageService.findNoticeCount(user.getId(), CommunityConstant.TOPIC_LIKE);
            messageVO.put("count", count);
            int unread = messageService.findNoticeUnreadCount(user.getId(), CommunityConstant.TOPIC_LIKE);
            messageVO.put("unread", unread);
        }
        model.addAttribute("likeNotice", messageVO);

        // 查询关注类通知
        message = messageService.findLatestNotice(user.getId(), CommunityConstant.TOPIC_FOLLOW);
        messageVO = new HashMap<>();
        if(message != null) {
            messageVO.put("message", message);
            String content = HtmlUtils.htmlUnescape(message.getContent());
            Map<String,Object> data = JSONObject.parseObject(content, Map.class);
            messageVO.put("user", userService.findUserById((Integer) data.get("userId")));
            messageVO.put("entityType", data.get("entityType"));
            messageVO.put("entityId", data.get("entityId"));

            int count = messageService.findNoticeCount(user.getId(), CommunityConstant.TOPIC_FOLLOW);
            messageVO.put("count", count);
            int unread = messageService.findNoticeUnreadCount(user.getId(), CommunityConstant.TOPIC_FOLLOW);
            messageVO.put("unread", unread);
        }
        model.addAttribute("followNotice", messageVO);

        // 查询未读消息数量
        int letterUnreadCount = messageService.findLetterUnreadCount(user.getId(), null);
        model.addAttribute("letterUnreadCount", letterUnreadCount);
        // 未读通知数量
        int noticeUnreadCount = messageService.findNoticeUnreadCount(user.getId(), null);
        model.addAttribute("noticeUnreadCount", noticeUnreadCount);

        return "site/notice";
    }

    @GetMapping("/notice/detail/{topic}")
    public String getNoticeDetail(@PathVariable("topic") String topic, Model model, Page page) {
        User user = hostHolder.getUser();

        page.setLimit(5);
        page.setPath("/notice/detail/" + topic);
        page.setRows(messageService.findNoticeCount(user.getId(), topic));

        List<Message> noticeList = messageService.findNotices(user.getId(), topic, page.getOffset(), page.getLimit());
        List<Map<String, Object>> noticeVOList = new ArrayList<>();
        noticeList.forEach(notice -> {
            Map<String, Object> map = new HashMap<>();
            // 通知
            map.put("notice", notice);
            // 内容
            String content = HtmlUtils.htmlUnescape(notice.getContent());
            Map<String,Object> data = JSONObject.parseObject(content, Map.class);
            map.put("user", userService.findUserById((Integer) data.get("userId")));
            map.put("entityType", data.get("entityType"));
            map.put("entityId", data.get("entityId"));
            map.put("postId", data.get("postId"));
            // 通知作者
            map.put("fromUser", userService.findUserById(notice.getFromId()));
            noticeVOList.add(map);
        });
        model.addAttribute("notices", noticeVOList);

        // 设置已读
        List<Integer> ids = getLetterIds(noticeList);
        if (!ids.isEmpty()) {
            messageService.readMessage(ids);
        }

        return "site/notice-detail";
    }
}
